Finding the Fourth Proportional to 1,174.47, 1,761.71 and 308.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,174.47 : 1,761.71 = 308.79 : x
2. Step 2: Convert to fraction form
   1,174.47/1,761.71 = 308.79/x
3. Step 3: Cross multiply
   1,174.47x = 1,761.71 × 308.79
4. Step 4: Simplify right side
   1,174.47x = 543,996.89
5. Step 5: Solve for x
   x = 543,996.89/1,174.47
6. Step 6: Final answer
   x = 463.19